Improvement in tackle-hooks



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HENRY THOMPSON, OF'ROOILAND, MAINE.

Letters Patent No. 103,687, claftelMay-Bl, 1870.

IMPROVEMENT IN' TACKLE-HOOKS.

The Schedule referred t9 in these Letters Patent and making part of the same.

To all -whom 'it may concern Be it known that I, HNRY THOMPSON, of Rockland, in the county of Knox and State'of Maine, have invented a new and useful Improvement in Tackle- Hooks; and do hereby'declare that the following description, taken in connect-ion with the accompanying plate of drawings hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nat-ure and principles of my said improvement, by which my invention may he distinguished from others of-a similar class, together with such parts as I claim and desire to secure by Letters Patent.

My invention relates to lthat class of hooks which is attached to blocks or pulleys; and

The nature thereof consists in providingthe said hook with a cleft-iron, by means of whichit may be detached with facility from the object with which it is connected.

In theaccompauying plate of drawingswhich illustrates my invention, and forms a part ofthe specification thereof', in which corresponding Ipart-s are illustrated by similar letters- Figure l is a view, in perspective, of a hook and block of the ordinary forni, with my invention' appliedA thereto, and

Figure 2 avertical elevation of the same.

The construction, operation, and relative arrangement of the component parts of my invention are as follows, to wit:

To the block A is secured the hook B by means of the staple c. To the end of the said hook, which is provided with an aperture for that purpose, is ,pivot-ed the cleft-iron D.

The said cleft-iron consists of two prongs, d and d1,

attached to the eye-d?, which causes the cleft-iron to assume the position represented in fig. 1, and thereby disconnect the hook from the objectv to which 'it is attached. If a fall or line has beenrove through the sheavc of the block, it will be necessary to slaeken the same before disengagng the hook.

It is evident that niyuvention is equally applicable to double blocks, snatch-blocks, and other similar devices aud appliances.

' t I am aware that tripping'liues and detaching levers have been heretofore applied to tackle-blocks, and, therefore, do not claim the same, either severally or in combination, or irresp'ectively ofthe peculiartarrange- -ment thereof described; but

I claim and desire `to secure by Letters Patent- "lhe arrangement of the curvilinear cleft-iron, cou- Structed of a single piece. of metal, the hook, the' tripping line, and the staple attached to theblock through which the tripping liuc is lead, 'when constructed and jointly operating as .and for the purposes described. HENRY THOMPSON.

Witnesses:

ALLEN THOMPSON, CHARLES A.HENDnnsoN. 

